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Date:   Thu, 28 Apr 2022 13:22:05 -0700
From:   Marc MERLIN <marc@merlins.org>
To:     Josef Bacik <josef@toxicpanda.com>
Cc:     linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: Rebuilding 24TB Raid5 array (was btrfs corruption: parent
 transid verify failed + open_ctree failed)
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On Thu, Apr 28, 2022 at 04:13:31PM -0400, Josef Bacik wrote:
> On Thu, Apr 28, 2022 at 12:27 PM Marc MERLIN <marc@merlins.org> wrote:
> >
> > On Thu, Apr 28, 2022 at 11:30:35AM -0400, Josef Bacik wrote:
> > > Hell yes we're in the fs tree's now, in the home stretch hopefully.
> > > I've pushed new debugging, you may have another overlapping extent.
> > > I'm going to have to wire up a tool for that, but hopefully we can
> > > just target delete a few things and get you up and running.  Thanks,
> >
> > Delete Xilinx_Unified_2020.1_0602_1208/tps/lnx64/jre9.0.4/lib/modules ?
> 
> Cool, do
> 
> ./btrfs-corrupt-block -d "3700677820416,168,53248" -r 11223 <device>
> 
> Then you should be able to run the init-extent-tree and get past that
> part.  Thanks,

Sorry, I must be triggering every single unhandled path in the code :)

gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs-corrupt-block -d "3700677820416,168,53248" -r 11223 /dev/mapper/dshelf1
FS_INFO IS 0x55fd6e82d600
JOSEF: root 9
Couldn't find the last root for 8
FS_INFO AFTER IS 0x55fd6e82d600
kernel-shared/ctree.c:365: update_ref_for_cow: BUG_ON `ret` triggered, value -5
./btrfs-corrupt-block(+0x1137d)[0x55fd6d53237d]
./btrfs-corrupt-block(__btrfs_cow_block+0x3a9)[0x55fd6d533a90]
./btrfs-corrupt-block(btrfs_cow_block+0x73)[0x55fd6d53414f]
./btrfs-corrupt-block(btrfs_search_slot+0x11a)[0x55fd6d536b51]
./btrfs-corrupt-block(main+0x141d)[0x55fd6d56f4a9]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xcd)[0x7f526bee17fd]
./btrfs-corrupt-block(_start+0x2a)[0x55fd6d52d8ba]
Aborted

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